I had a request to add the Power Control Expansion module to my Android App. I wanted to investigate on what needs to be done so it could be implemented.

Doing a search on the forum lead me to discover that the Power Control Expansion module works exactly like a relay expansion and you can just toggle the ports ON/OFF like a standard relay port.

So, I interpret that as you simply designate that the Power Control Expansion is Relay Box 1 (if you only have a single relay box). Then you code the controller to control each each port on the Power Control Expansion just like a standard relay port.